Zhang Zhang was trained to be a musician, not by choice, not by pleasure, but entirely due to her overbearing father.  At 18 years old, she met Sergiu Luca who became her mentor. Then she started to see music as a way to connect people and to help people in need. That is the way a super talented violinist, member of the Orchestre Philharmonique de Monte Carlo became a social entrepreneur.  The encounter with her mentor was key. What is a mentor?  That is the question of the week.